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Rechargeable Battery
Installing
1
Insert Ni-MH BT-49Q battery pack into the DB-
57C battery holder.
2
Insert the battery pack into the instrument and
turn the battery compartment lock to “LOCK”.
Charging
1
Plug the AC/DC converter (AD-9B or AD-7C)
into the DB-57C battery holder.
2
Plug the converter power cord into an outlet.
(AD-9B is for AC120V, AD-7C is for AC230V)
3
Complete charging by unplugging the converter connector from the DB-57C battery
holder after approximately 9 hours.
4
Unplug the converter power cord.
The LED of DB-57C will indicate charging status:
Red ON : Charging.
Green ON : Charging completed.
Green flashing : BT-49Q battery pack is not installed correctly.
Red flashing : BT-49Q battery pack protection feature is working automatically.
RL-H3A/B can be used in this state.
Automatic protection feature: In case of overcharge or high or low temperature state exceed-
ing charging range, charging will be stopped or changed to protect battery.
POWER
AC/DC converter
AD-9B/7C
DB-57C
LED
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